Photographic camera.



A. VAUTIBR-DUFOUR.

PHQTOGRAPHIC CAMERA.

APPLICATION FILED JAN. 26.1011.

Patented Jan. 21, 1913.

3 SHEETS-SHEET 1 A. VAUTIER-DUFOUR.

PHOTOGRAPHIC CAMERA.

APPLICATION FILED JAN.26,1911,

' 1,051,034, Patented Jan. 21, 1913.

3 SHEETS-@HEBT 2.

A. VAUTIER-DUFOUR.

PHQTOGRAPHIG CAMERA.

APPLICATION FILED JAN.26. 1011.

1,051,034. Patented Jan. 21, 1913.

3 SHEETSSHEET 3.

tinrrnn Accuses vAUTIER-nUrooR. or GRANDSON. SWITZERLAND.

roar-psi.

Specification of Letters P atent. Application and lanuazy 2's. i911;

PHQToGRAPHIo CAMERA.

Patented Jan. 1 91 3. semi No. 604.773.

ain new and useful Improve- .Jl Relating to Photographic 'hich the following is a specifihi .i to present invention relates to a photographic cau ra which is provided with mirrors which are interposed in the path ot the rays of light coming from the objective to the pl'iotographic plate or fihn'. in order to allow an objective of great focal length to be e111; loved. iiccording to the present inven 11. these mirrors are arranged so as to allow ol'ijectiies of different focal lengths to be employed with the same camera. F or this purpose.- themirror whichreceives the ra of light from the objective is placed so that it can be (l'iSpliiCHl together with the objective in a direction which is parallel to that of the axis of the pencil of the rays of light which are reflected by this mirror and so that it can be moved toward or away from the other. mirror in order to produce a variation of the length of the path along which travel the. rays of light from the ob jective to the focusing screen or to the photogra 'ihic plate or film. This arrangement can. for instainrc. be advantageously' empluycd for kincniatographic inner-as. I H

nnpanying drawhigs illustrate by two en'ibodinients of the hic iranicra, according to the pres lion. and a variation of one ot'these iii )[.1ll \i:nl3- i he tlrnwi g n i it: 51

Fi ure l an elevation cross section illustrating i i r of my invention. Fig. 2 ross section and partial elevation taken I line 1:. 11-. Fig. 1. Fig. 3 is an end view of g I =t' the invention shown in Figs. 1 i

l is a central. cross section illus modified form'of the invention. w section taken on line .11. f l ig'. n is a cross sectiiin illustrating 5 a modified form of the focusing glass shown i and 5. and Fig. 7 a cross section a. 5.

iii-st embodiment represented in Figs. 1 to l. .4 designates a small board adapted to support the ob ective of lUN8- matographic camera a of the usual typed l L". at tent al of which only the anterior part is represented 111 Fig. 2. The board a supports a chami ber or compartment 1) 1n which a first mirror is placed. Furthermore it supports two guides a? on which a second chamber (l may slide, inwhich chamber a mirror 6 is placed and which supports the objective 1' and a screw'g which is provided with a disk carrylng a handle 9' to turn the screw as desired in one or the other directions.

vThe screw g passes through a screwed socket which is supported by one of. the slides 1 'By turning the screw the cham: ber orcompartment (Z may be caused to slide on the guides '0 and the mirror 6 and the objective to move toward or away from the inirror'c. The chamber d surrounds the chamber 5 on the three free sides of the same. the light being prevented from passing between the walls of these chambers by means of a packing b which is secured in the outer faces of the chamber 6.

A packing a 'prevents the passage of rays of light between the board a and the adjacent faceof the chamber (I. The mirrors 0 and c are placed parallel to each other at an inclination of 45 to the axis of the'ra-ys of light comingfrom the objective, and to the axis of the rays of light reflected to the sensitive surface, in such a manner that the position of the axis of the rays of light be tween the mirrors, remains fixed during the adjustments ofthe chamber (7. These adjustments make it possible to vary the length of thepath of the raysof light from the objective, to the photographic plate or film and consequently objectives having different focal lengths may be employed.

The mirror (r is placed on a shaft 61 which is provided with an gimm The latter supports a screw which passes through a groove provided in a plate h which is supported by a rod 72. This rod can'slide in a guiding pipe 12 which is supported by the chamber 7) and is provided outside the same with a but-ton 71 -wl1ich, when it is pulled in the direction shown in Fig. 1. by the arrow from the position shown in this figure, moves the mirror 0 backward in the chamber 7) by overcoming the action of the springs c which tend to maintain the mirror in its i resting position shown in full lines, in which in an oblique plate 0 arranged in the'chainber b, in order to bring the mirror in the position shown in Fig 2, by dash dotted lines. On the chamber 6 a'tube i is fixed which is provided inside with a screw-thread'and in which a ring 2" is screwed, which supports aground glass or focusing screen II. On the tube 2'- a second tube is supporting a lens k can slide. The position of the ring z" is regulated in such a 'manner that when the mirror '0 is turned down backward, the ground surfaceof the glass z" is at the same distance from the objective as the sensitive surface which is in the camera a. It is i therefore possible, after having brought the mirror 0 to the osition shown in Fig. 2, to focus, by observing, by means of the lens is, the image which appears on the screen i.

In the embodiment shown in Figs. 4 and 5, the two chambers b and (1 instead of-forming a tube of variable length, as in the foregoing embodiment, are connected by means of bellows Z, and the displacement: of the chamber cl can be produced lo means of a sov button 9 of a transverse sha t g which is provided with pinions g gearing with racks g which are-fixed on the slides a.

The backward movement of the mirror 0 can be obtained by means ofa handle a, which is supported by the shaft 0 of the mirror and is placed within the chamber 6. The focusing screen i is supported by a plate i which is connected with the chamber 6 by means of bellows m and suitable supports which permit the plated to be turned against the chamber 1) and are formed so that, when they are stretched, the focusing screen i is at the same distance from the objective as the sensitive plate or film which is in the chamber.

As the pencil of rays of light coming from the objective is only. once reflected between the objective and the focusing screen, the right side of the objects appears at'the leftside of the screen and vice-versa. In' order to prevent this and to permit the focusing by looking in the direction of the object to be photographed and also to rniit placing the apparatus in the same direction as the object, the plate i can, as shown in Fig. 6, support a mirror 11 which parallel to the mirror e and which reflects n the vertically placed focusing screen 2' the rays'of light coming from 6. I

I claim as my invention: 1. In a photographic camera an objective lens, two compartments and a mirror in each compartment, the mirrors being set at an incline to the paths of the rays of light to and through the compartments and'par- Izgllcl to each other and the compartments em reguI te the distance between the said mirrors. 2. In a photographic camera, an objective lens, a compartment to the frame of which the objective lens is secured, a .mirror insaid compartment, a second compartment slidable within the first compartment, and'a mirror in said second compartment parallel to the first aforesaid mirror, the light being reflected b said mirror from the objective lens to a p otographic plate or film.

3. In a photographic camera, an objective lens, a compartment. to the frame of which the objective lens is secured, a mirror in said compartment, a second compartment slidable within the first compartment, a mirror'in said second compartment parallel to the first aforesaid mirror, the light being slidable the one within the other to' reflected by said mirrors from the objective lens to 'a photographic plate or film, a focusing screen, and means .for turning back the mirror in the said second compartment to permit the light .to'reach the said focusing screen.

In testimony whereof I have afiixed my signature in presence of /two witnesses.

AUGUSTE VAUTIER-DUFOU R. \Vitnesses:

L. H. MUNIA, Ron'r. \Vonrmmsno. 

